Silverado 1500 2WD V8-6.0L Hybrid (2009)
Hydraulic Control Assembly - Antilock Brakes: Service and Repair
Brake Pressure Modulator Valve Replacement
Removal Procedure
Warning
The high pressure accumulator (HPA) and the chambers of the brake modulator assembly to which it attaches, store brake fluid at extremely high
pressures. Fluid pressure must be relieved before attempting to service the HPA. Ensure that the recommended procedures are followed to relieve system
pressure, including using the manual pressure release steps. Failure to properly follow procedures to depressurize the system may result in personal
injury.
Warning: Refer to Brake Fluid Irritant Warning (See: Service Precautions/Technician Safety Information/Brake Fluid Irritant Warning) .
Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution (See: Service Precautions/Vehicle Damage Warnings) .
Caution: Always connect or disconnect the wiring harness connector from the EBCM/EBTCM with the ignition switch in the OFF position. Failure to
observe this precaution could result in damage to the EBCM/EBTCM.
Note
The ignition must be in the OFF position, without pausing at ACCESSORY, and without applying the brake pedal to ensure the brake modulator and
high pressure accumulator (HPA) pressure relief occurs. This process will take approximately 1-3 minutes.
1. Turn the ignition to OFF, without pausing at ACCESSORY, and without applying the brake pedal.
Remove the ignition key.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (See: Maintenance/Vehicle Lifting/Service and Repair) .
3. Remove the antilock brake system (ABS) module splash shield retainer (1).
